Blank sequential DVD-RW, deformat overwriteable DVD-RW
This commit is contained in:
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b18b889750
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@ -96,7 +96,19 @@ the archivers afio and star. Not suitable seems GNU tar.
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.br
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CD-R can be initially written only once and eventually extended until they
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get closed (or are spoiled because they are overly full). After that they are
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read-only.
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read-only. Closing is done automatically unless option
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.B -multi
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is given which keeps the media appendable.
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.br
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There are two write modes,
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.B -tao
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and
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.B -sao .
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.br
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-tao allows to use track source of unpredictable length (like stdin) and allows
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to write further sessions to appendable media. -sao produces audio sessions
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with seamless tracks but needs predicted track sizes and cannot append sessions
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to media.
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.br
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CD-RW media can be blanked to make them re-usable for another
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round of overwriting. Usually
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@ -106,9 +118,9 @@ Blanking damages the previous content but does not
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make it completely unreadable. It is no effective privacy precaution.
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Multiple cycles of blanking and overwriting with random numbers might be.
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.PP
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.B Recordable DVD Media:
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.B Overwriteable DVD Media:
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.br
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Currently only types DVD+RW, DVD-RW and DVD-RAM can be burned via cdrskin.
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Currently only types DVD+RW, DVD-RW and DVD-RAM can be overwritten via cdrskin.
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.br
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DVD+RW and DVD-RAM media get treated as blank media regardless wether they
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hold data or not. They need no special initial formatting.
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@ -118,12 +130,44 @@ Speed is counted in DVD units (i.e. 1x = 1,385,000 bytes/second). Currently
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there is no difference between -sao and -tao. If ever, then -tao will be the
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mode which preserves the current behavior.
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.br
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DVD-RW need to be formatted to state "Restricted Overwrite". Then they behave
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much like DVD+RW. This formatting can be done by option
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DVD-RW are sold in state "Sequential Recording". To become suitable for the
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Overwriteable DVD recoding model they need to get formatted to state
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"Restricted Overwrite". Then they behave much like DVD+RW. This formatting
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can be done by option
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.B blank=format_overwrite
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It is necessary for unused media, for media written or blanked by cdrecord,
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for media which have been written unformatted by growisofs or blanked by
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dvd+rw-format -blank. If in doubt, just give it a try.
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.br
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Several programs like dvd+rw-format, cdrecord, wodim, or cdrskin option
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blank=deformat_sequential can bring a DVD-RW out of overwriteable state so
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that it has to be formatted again. If in doubt, just give it a try.
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.PP
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.B Sequentially Recordable DVD Media:
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.br
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---------------
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.br
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Note: The support for sequentially recordable media is still emerging.
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.br
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DVD-R have not been tested yet. If no Incremental Streaming feature (21h)
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is offered, then the media is regarded as unsuitable without further
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explanation. (One can torture DVD-RW to make them offer only DAO (2Fh)).
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Only single-track sessions have been tested yet. Multi-session works but
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-toc and -msinfo are not implemented yet.
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.br
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---------------
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.br
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Currently only DVD-RW (and most probably DVD-R) can be used for the Sequential
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recording model. DVD-RW must be in state "Sequential Recording". The media must
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be either blank or appendable. Newly purchased DVD-RW media are in this state.
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Used DVD-RW get into blank sequential state by option
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.B blank=deformat_sequential .
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.br
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Incremental Streaming is the default write mode if it is offered by the media.
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It resembles much TAO writing with CD, as it allows track sources of
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unpredicted length and to keep media appendable by option
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.B -multi .
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Only restriction towards CD-RW is the lack of support for -audio tracks.
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.br
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(The other write mode, DAO, is not implemented yet. It will allow no -multi and
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only a single track.)
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.PP
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.B Drive preparation and addressing:
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.br
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@ -194,14 +238,15 @@ help
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Print this list of blanking types.
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.TP
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all
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Blank an entire CD.
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Blank an entire CD-RW or an unformatted DVD-RW.
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.TP
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fast
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Minimally blank an entire CD.
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Minimally blank an entire CD-RW or an unformatted DVD-RW.
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.TP
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format_overwrite
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Format a DVD-RW to "Restricted Overwrite". The user should bring some patience.
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(Note: format_overwrite* are not original cdrecord options.)
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.br
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(Note: blank=format_overwrite* are not original cdrecord options.)
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.TP
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format_overwrite_quickest
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Like format_overwrite without creating a 128 MB trailblazer session.
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@ -215,8 +260,16 @@ rather than just 128 MB.
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Most traditional formatting is attempted. No data get written.
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Much patience is required.
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.br
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This option treats already formatted media even if not option -force is given.
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.br
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For DVD+RW this is the only supported explicit formatting type. It provides
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complete "de-icing" so no reader slips on unwritten data areas.
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.TP
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deformat_sequential
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Like blank=all but with the additional ability to blank overwriteable DVD-RW.
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This will destroy their formatting and make them sequentially recordable.
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.br
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(Note: blank=deformat_sequential is not an original cdrecord option.)
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.RE
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.TP
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.BI \-checkdrive
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@ -591,13 +644,13 @@ cdrskin dev=ATA:1,0,0 -atip
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.br
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cdrskin dev=/dev/hdc -toc
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.SS
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.B Make used CD-RW writable again:
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.B Make used CD-RW or used unformatted DVD-RW writable again:
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.br
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cdrskin -v dev=/dev/sg1 blank=all -eject
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.br
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cdrskin -v dev=/dev/dvd blank=fast -eject
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.SS
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.B Format DVD-RW before first use with cdrskin:
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.B Format DVD-RW to avoid need for blanking before re-use:
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.br
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cdrskin -v dev=/dev/sr0 blank=format_overwrite
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.SS
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@ -7,7 +7,7 @@ A cdrecord compatible command line interface for libburn.
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This project is neither directed against original cdrecord nor does it exploit
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any source code of said program. It rather tries to be an alternative method
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to burn CD which is not based on the same code as cdrecord.
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to burn CD or DVD, which is not based on the same code as cdrecord.
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See also : http://scdbackup.sourceforge.net/cdrskin_eng.html
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Interested users of cdrecord are encouraged to contribute further option
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@ -33,47 +33,9 @@ The implementation of an option would probably consist of
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See option blank= for an example.
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------------------------------------------------------------------------------
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About compliance with *strong urge* of API towards burn_drive_scan_and_grab()
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For a more comprehensive example of the advised way to behave with libburn
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see test/libburner.c .
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cdrskin was the initiator of the whitelist functionality within libburn.
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Now it has problems to obviously comply with the new API best practice
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presciptions literally. Therefore this explanation:
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On start it restricts the library to a single drive if it already knows the
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persistent address by option dev= . This is done with a combination of
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burn_drive_add_whitelist() and burn_drive_scan(). Not compliant to the
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literal strong urge but in fact exactly fulfilling the reason for that
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urge in the API: any scanned drive might be opened exclusively after
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burn_drive_scan(). It is kernel dependent wether this behavior is on, off
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or switchable. The sysdamin will want it on - but only for one drive.
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So with dev=... cdrskin complies to the spirit of the strong urge.
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Without dev=... it has to leave out the whitelist in order to enable bus
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scanning and implicit drive address 0. A tradition of 9 months shall not
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be broken. So burns without dev= will stay possible - but harmless only
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on single drive systems.
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Burns without dev= resp. with dev=number are harmless on multi-drive systems.
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This is because Cdrskin_grab_drive() either drops the unwanted drives or
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it enforces a restart of the library with the desired drive's persistent
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address. This restart then really uses the strongly urged function
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burn_drive_scan_and_grab().
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Thus, cdrskin complies with the new spirit of API by closing down libburn
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or by dropping unused drives as soon as the persistent drive address is
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known and the drive is to be used with a long running operation. To my
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knowlege all long running operations in cdrskin need a grabbed drive.
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This spaghetti approach seems necessary to keep small the impact of new API
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urge on cdrskin's stability. cdrskin suffers from having donated the body
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parts which have been transplanted to libburn in order to create
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burn_drive_scan_and_grab() . The desired sysadmin friendlyness was already
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achieved by most cdrskin runs. The remaining problem situations should now
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be defused by releasing any short time grabbed flocks of drives during the
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restart of libburn.
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For a more comprehensive example of the advised way to write an application
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of libburn see test/libburner.c .
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------------------------------------------------------------------------------
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This program is currently copyright Thomas Schmitt only.
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@ -2388,7 +2350,7 @@ struct CdrskiN {
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bit8 = write zeros after formatting
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bit9 = insist in size 0
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bit10= format to maximum available size
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2=format_sequential (unimplemented yet)
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2=deformat_sequential (blank_fast might matter)
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*/
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double blank_format_size; /* to be used with burn_disc_format() */
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@ -3900,10 +3862,10 @@ int Cdrskin_blank(struct CdrskiN *skin, int flag)
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int ret,loop_counter= 0,hint_force= 0,do_format= 0, profile_number= -1;
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int wrote_well= 1;
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double start_time;
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char *verb= "blank", *presperf="blanking", *fmt_text= "format_...";
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char *verb= "blank", *presperf="blanking", *fmt_text= "...";
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char profile_name[80];
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static char fmtp[][40]= {
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"format_default", "format_overwrite", "format_sequential"};
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"format_default", "format_overwrite", "deformat_sequential"};
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static int fmtp_max= 2;
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start_time= Sfile_microtime(0); /* will be refreshed later */
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@ -3921,7 +3883,7 @@ int Cdrskin_blank(struct CdrskiN *skin, int flag)
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if(skin->verbosity>=Cdrskin_verbose_progresS)
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Cdrskin_report_disc_status(skin,s,0);
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do_format= skin->blank_format_type & 0xff;
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if(do_format) {
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if(do_format == 1) {
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verb= "format";
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presperf= "formatting";
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}
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@ -3938,29 +3900,28 @@ int Cdrskin_blank(struct CdrskiN *skin, int flag)
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}
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#endif /* Cdrskin_libburn_has_pretend_fulL */
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if(do_format) {
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if(do_format)
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if(do_format>=0 && do_format<=fmtp_max)
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fmt_text= fmtp[do_format];
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if(do_format!=1) {
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/* >>> other formats to come. At least _sequential */;
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if(do_format==2) {
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/* Forceful blanking to Sequential Recording for DVD-R[W] and CD-RW */
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if(!(profile_number == 0x14 || profile_number == 0x13 ||
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profile_number == 0x11 || profile_number == 0x0a))
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goto unsupported_format_type;
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if(s==BURN_DISC_UNSUITABLE)
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fprintf(stderr,
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"cdrskin: SORRY : only blank=%s is implemented yet\n",fmtp[1]);
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return(0);
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} else if(profile_number == 0x14) { /* DVD-RW sequential */
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if(do_format!=1)
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goto unsupported_format_type;
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} else if(profile_number == 0x13) { /* DVD-RW restricted overwrite */
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if(do_format==1 && skin->force_is_set) {
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"cdrskin: NOTE : blank=%s accepted not yet suitable media\n",
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fmt_text);
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} else if (do_format==1) {
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/* Formatting to become overwriteable for DVD-RW and DVD+RW */
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if(profile_number == 0x14) { /* DVD-RW sequential */
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/* ok */;
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} else if(do_format!=1) {
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unsupported_format_type:;
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fprintf(stderr,
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"cdrskin: SORRY : blank=%s : unsupported format and/or media type\n",
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fmt_text);
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return(0);
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} else {
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} else if(profile_number == 0x13) { /* DVD-RW restricted overwrite */
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if(!(skin->force_is_set || ((skin->blank_format_type>>8)&4))) {
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fprintf(stderr,
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"cdrskin: NOTE : blank=format_... : media is already formatted\n");
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fprintf(stderr,
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@ -3968,15 +3929,11 @@ unsupported_format_type:;
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return(2);
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}
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} else if(profile_number == 0x1a) { /* DVD+RW */
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if(do_format!=1)
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goto unsupported_format_type;
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if(!((skin->blank_format_type>>8)&4)) {
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fprintf(stderr,
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"cdrskin: NOTE : blank=format_... : DVD+RW do not need this\n");
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fprintf(stderr,
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"cdrskin: HINT : For de-icing use option blank=format_overwrite_full");
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fprintf(stderr,
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"cdrskin: HINT : If you really want to re-format, add option -force\n");
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return(2);
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}
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} else {
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@ -3989,7 +3946,8 @@ unsupported_format_type:;
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"cdrskin: NOTE : blank=%s accepted not yet suitable media\n",
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fmt_text);
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} else { /* do_format */
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} else if(do_format==0) {
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/* Classical blanking of erasable media */
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if(s!=BURN_DISC_FULL &&
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(s!=BURN_DISC_APPENDABLE || skin->no_blank_appendable)) {
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@ -4015,7 +3973,13 @@ unsupported_format_type:;
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return(0);
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}
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} /* ! do_format */
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} else {
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unsupported_format_type:;
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fprintf(stderr,
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"cdrskin: SORRY : blank=%s is unsupported with media type %s\n",
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fmt_text, profile_name);
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return(0);
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}
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if(skin->dummy_mode) {
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fprintf(stderr,
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@ -4027,11 +3991,11 @@ unsupported_format_type:;
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Cdrskin_adjust_speed(skin,0);
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#ifndef Cdrskin_extra_leaN
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Cdrskin_wait_before_action(skin,1+(!!do_format));
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Cdrskin_wait_before_action(skin,1+(do_format==1));
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#endif /* ! Cdrskin_extra_leaN */
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skin->drive_is_busy= 1;
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if(do_format==0) {
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if(do_format==0 || do_format==2) {
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burn_disc_erase(drive,skin->blank_fast);
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#ifdef Cdrskin_libburn_has_burn_disc_formaT
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@ -4074,7 +4038,7 @@ blanking_done:;
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fprintf(stderr,
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"\rcdrskin: %s done \n",
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presperf);
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printf("%s time: %.3fs\n",(do_format?"Formatting":"Blanking"),
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printf("%s time: %.3fs\n",(do_format==1?"Formatting":"Blanking"),
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Sfile_microtime(0)-start_time);
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}
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fflush(stdout);
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@ -5159,9 +5123,10 @@ set_blank:;
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skin->do_blank= 1;
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skin->blank_format_type= 1;
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skin->blank_format_size= 0;
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} else if(strcmp(cpt,"format_sequential")==0) {/* >>> not yet supported */
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} else if(strcmp(cpt,"deformat_sequential")==0) {
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skin->do_blank= 1;
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skin->blank_format_type= 2;
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skin->blank_fast= 0;
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} else if(strcmp(cpt,"help")==0) {
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/* is handled in Cdrpreskin_setup() */;
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continue;
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@ -1 +1 @@
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#define Cdrskin_timestamP "2007.01.30.220220"
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#define Cdrskin_timestamP "2007.01.31.130100"
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@ -235,9 +235,11 @@ void burn_disc_erase(struct burn_drive *drive, int fast)
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/* ts A70103 moved up from burn_disc_erase_sync() */
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/* ts A60825 : allow on parole to blank appendable CDs */
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/* ts A70131 : allow blanking of overwriteable DVD-RW (profile 0x13) */
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if ( ! (drive->status == BURN_DISC_FULL ||
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(drive->status == BURN_DISC_APPENDABLE &&
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! libburn_back_hack_42) ) ) {
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! libburn_back_hack_42) ||
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drive->current_profile == 0x13 ) ) {
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libdax_msgs_submit(libdax_messenger, drive->global_index,
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0x00020130,
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LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
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@ -246,6 +248,10 @@ void burn_disc_erase(struct burn_drive *drive, int fast)
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return;
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}
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/* ts A70131 : i get awful results with fast blanking DVD-RW */
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if (drive->current_profile == 0x13 || drive->current_profile == 0x14)
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fast = 0;
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o.drive = drive;
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o.fast = fast;
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add_worker(drive, (WorkerFunc) erase_worker_func, &o);
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